Back brace



FIG. 1 is top right, front perspective view of the back brace showingour new design;

FIG. 2 is front view of the design shown in FIG. 1;

FIG. 3 is a back view of the design shown in FIG. 1;

FIG. 4 is a right side view of the design shown in FIG. 1;

FIG. 5 is a left side view of the design shown in FIG. 1;

FIG. 6 is a front, top view of the design shown in FIG. 1; and,

FIG. 7 is a back, bottom view of the design shown in FIG. 1.

The broken lines shown in the drawings represent unclaimed portions ofthe back brace and form no part of the claimed design.

CLAIM The ornamental design for a back brace, as shown and described.